RIA Psychrometrics & Structural Drying Principles 2

Question 1

What are the three recognized phases of structural drying listed in the correct sequence?

Accepted Answer

Extraction, Evaporation, Dehumidification

Answer

The three phases are extraction (remove bulk water), evaporation (convert liquid to vapor at surfaces), and dehumidification (remove vapor from the air).

Question 2

Which class of water damage is characterized by a slow evaporation rate and minimal moisture absorbed into materials?

Accepted Answer

Class 1

Answer

Class 1 water damage involves the least water absorbed by materials, a slow evaporation rate, and typically affects only part of a room.

Question 3

What temperature range is generally recommended to optimize evaporation during a structural drying project?

Accepted Answer

70°F to 90°F

Answer

Warmer temperatures in the 70–90°F range increase vapor pressure in wet materials, significantly accelerating the evaporation rate.

Question 4

What is the primary function of an air mover in a structural drying setup?

Accepted Answer

To increase the evaporation rate by replacing the saturated boundary layer of air at material surfaces

Answer

Air movers create turbulence over wet surfaces, replacing the saturated boundary layer of air with drier air, which dramatically accelerates evaporation.

Question 5

What is 'vapor pressure' in the context of structural drying?

Accepted Answer

The partial pressure exerted by water vapor within a mixture of gases

Answer

Vapor pressure is the pressure exerted by water vapor molecules; moisture migrates from areas of high vapor pressure (wet materials) toward areas of low vapor pressure (dry air).

(RIA) Restoration Industry Association Certified Practice Test

(RIA) Restoration Industry Association Certified Practice Test

RIA Psychrometrics & Structural Drying Principles 2